The Mysterious Vanishing Hard Drive

I was having an issue with the main PC that we use at home. Over the last couple of months, from time to time, one of us wouldn’t be able to log in. It was the famous infamous Windows 10 black screen. When they logged in, a cursor would appear over a black background and then nothing else. The only thing people can say for sure about the black screen of death in Windows 10 is that there are a figurative crap-ton of things that can cause it. It can be anything from video drivers to Microsoft Store corruption. Or it may be failed Windows updates or firmware issues. It has many causes, and no quick solutions.